I have an '86 F250 with an inline 6--everything's stock as far as I can tell. A small crack in the exhaust manifold allowed flames to reach up and melt wires/vacuum lines directly above it. I'm trying to piece it all back together but I know next to nothing about cars and I'm lost. I've taken very detailed pics of each line I'm stuck on as well as a color coded diagram of the Vac lines off the engine (in other words, the diagram matches the vacuum line setup exactly).

I just need someone to look at the pics and read the notes I've include below and it should be fairly easy for someone to quickly figure it out--I hope.

Here's the link to the pics: <map name="emick32_1986 F250 Vacuum diagram"><area shape="rect" coords="99,365,309,376" title="Click here to visit the Web Photo Album page" href="http://vicman.net/webalbum/"><area shape="rect" coords="0,0,388,398" title="1986 F250 Vacuum diagram" href="http://emick32.pho.to/albums/1986_f250_vacuum_diagram/index.htm"></map><img src="http://emick32.pho.to/albums/1986_f250_vacuum_diagram/pho.to.png" border="0" width="388" height="398" usemap="#emick32_1986 F250 Vacuum diagram">




And my questions/notes:

GREEN LINE
The cut green line in the pic is supposed to go to "WOT"? The only meaning for the abbreviation I can find means wide open throttle--I still don't know where to hook the line up to.

ORANGE
right now the line comes off of "VVA" and is supposed to go to "SA-FV" and then to the carb (v) "SA-FV" is a fuel vacuum separator I think, but no clue what it looks like. Also don't know where to hook it to the carb (v?)

RED
The line in question is the bottom line which comes off "VRESR". At the first junction, I can see the line which splits and goes to "P/D MTR" so I know that's not it. Then the actual line in the truck has another junction--one piece is my mystery piece and the other end goes to some kind of doo-dad which looks to be hooked directly to the block. The doo-dad also has a line (larger than the vacuum lines) coming off and going to the brake boost.

OPEN VAC LINE
see pic titled "line from carb to ???" I think this may hook up to the part referenced in the line blow this one.

SOME KIND OF VALVE??
see pic titled "One end goes to carb". does this hook to the line I described above?

The other end of this valve says "dist" Is there supposed to be a line going directly to the dist? or does it junction into something else first and then go to the dist?

TWO SENSORS
see pic "electronic sensor interacts with throttle??" the end I'm holding is melted. What should the melted end be connected to?

The second sensor --see pic "sensor ?? bracketed onto side of carb? I have no idea what's supposed to hook onto this.

AIR CLEANER
See pic titled "Air Cleaner Intake" what line connects to this nipple?

See pic titled "Air cleaner top w/ green sensor" where does this end go to?

I've tried to be as clear and detailed as I could and I hope this isn't too much of a pain for someone to figure out. Even if you know one or two of the lines, it's more than I know now.

thanks very much!!

 

Look for a gizmo on the carb that the WOT line hooks to. It senses when the throttle is floored, and probably bleeds vacuum off the egr system. That is where the tee goes in the green line in the diagram.

If you look at the bottom of the diagram, it says "Front of vehicle". The carb picture and the ports are shown exactly where they come out of the carb in relation to the front of the vehicle. So the "V" port is at the back center of the carb.
Separator assembly-fuel vacuum:
(SA-FV) fuel vacuum separator FVS I don't know what this looks like myself.
Venturi vacuum amplifier:

(VVA) used with some EGR system so that carburetor venturi vacuum can control EGR valve operation; venturi vacuum is desirable because it is proportional to the airflow through the carburetor


VRESER is the vacuum reservoir or can. It stores vacuum and smooths it out. The vacuum in the engine goes up and down depending on where the throttle position is.

I am not sure what the P/D motor is. But think of everything starting over at the MAN VAC fitting. That's the main vacuum line fitting that is applying engine vacuum to to those lines. The red line should go by the PCV valve which sucks fumes out of the crankcase, and then continue over to the t and the vacuum can(VRESER).



The picture above looks like the WOT gizmo. You can see it has a plunger that would be hit by the throttle, and the spring and stuff out the other end are where it has melted and come apart. So I believe the nipple where the vacuum line connects to the WOT is totally gone.


The above looks like the SA-FV or fuel vacuum seperator. The carb end would go to "V" and the dist end would go to the VVA


The picture above is the A/CL DV or air cleaner divertor. It should go to "green unit" which is the VRDV or
Vacuum retard delay valve:
(VRDV) Used to delay release of vacuum from a diaphragm -- a momentary vacuum trap

There is another port on top of the aircleaner, This should have a line going to the red line with a tee.

 

I removed all that stuff. (100lbs) I have increased my mileage by 4 mpg. I think the guys that hung emission junk in the early years had a Brain Deficit!
PS get rid of that carb.
You will find with the gasoline now you will emit less stuff in the air!
Topgo

 

See the other empty port beside the vacuum line on top of thr aircleaner? That should hook to a tee with the red line and go to the MAN VAC.



If you can account for lines "E" "S" and "3", then the above line might be the "V". That big fat line coming out of the carb picture is the "BV" or bowel vent. If the above line turns out to be the "V", then it will go to the fuel seperator thing(SA-FV).

 

I think you are correct on the above. One to the melted wot on the bracket, and the other to the VCV or vacuum control valve.


The above is the VCV. It measures the water temperature, and when the engine is warmed up, lets vacuum through.

 

The above is the MAN/VAC fitting.


Does this red line go to the VRESER? You should have a round ball or a tin can looking thing mounted somewhere and that will be the vacuum reservoir.

 

thanks very much!